<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <mate http-eauiv="X-UA-Compatible"content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="vue.js"></script>
</head>
<body>
    <div id="app">\
        <div ref="self">test</div>
    </div>
<script>
    var vm = new Vue({
    el: '#app',
    data: {
    msg:'ok'
    },
    beforeDestroy(){
        console.log('销毁之前')
        console.log(this.Srefs.self)
        console.log(this.msg)
        console.log(vm)
    },
    destroyed(){
        console.log('销毁之后')
         console.log(this.$refs.self)
         console.log(this.msg)
         console.log(vm)
    }
})
</script>
</body>
</html>